The Port of Seattle’s Maritime Division and Economic Development Department plans to buy over 240,000 therms of renewable natural gas from Puget Sound Energy in a move that’s expected to annually reduce carbon emissions by about 1,291 metric tons, the port announced Feb. 6. The port department said that it plans to use the renewable natural gas at all its facilities that use natural gas, including Pier 66, Terminal 91 and its maintenance facilities. “PSE’s Renewable Natural Gas program will immediately cut our own maritime division greenhouse gas emissions almost in half,” said Port Commissioner Ryan Calkins. “That reduction helps…